Woah. So many pleas for help. Can only help with two or three...
Mktg101: Read the book, or skim it at least. Be cynical about the subject, but don't let that show through (people don't like you questioning their life's work): overemphasis, exaggeration and hyperbole are your friend. Revise your Business Studies basics: the four P's (product, place, price.... P-something), and use SWOT analysises to structure your essay responses (do they still have essay responses? For the uninitiated, SWOT = Strengths, Weaknesses, Opportunities, Threats). If in doubt about multiple choice, go for the one just dripping with BS.
...and if you're not sure about how cynical to be, remember that a product with design faults isn't the fault of the engineers: it's the marketeers' role to turn problems into pluses (ever heard the line "no unnecessary features"?
).. or, as the marketeers put it: "add value". Be cynical, don't let it show through, have fun with the exam.
Psy104: Just multiple choice still? Don't know what to say here. From memory, the psych exams weren't too much of a breeze. There were, however, (as normal in multiple choice exams) a lot of questions which help you answer other ones. Also, sometimes in psych things are rather obvious. Think about your personal experiences with the question's subject, and what you'd expect. I remember finding a few times that the answers to questions could be worked out based on principles from other topics within psy104, if that makes sense.
It's difficult to give much advice for multiple choice exams. Take two pencils (pacers/retractable pencils are better, but have a backup pencil.) and a rubber. Don't be an idiot like me and start answering question #1 in the #50 row.
Stat270: As redruM said, do as many past papers as possible... BEST ADVICE I could give you is to get a rough idea of what you should be expecting. If you've no idea, and are lost, don't flounder about wondeing what to do,
find what you can do, and do that.